Typically I don’t use the latest DX version, simply because these issues of “the new DX has more problems than the old one” has been a recurring issue from Microsoft and developers since DX9.
It seems to take a couple years until everything settles down, both on the developer side and on the “user configuration” end.
My own system is Ryzen 7 2700X, GEForce RTX 2070, 32GB Ram. Not high end but not a potato either. With DX11 things run mostly smoothly, with some stutter and pausing, mostly on undocking or the occasional gate exit. With a fairly rare “undocking gives a black screen fo 15 seconds or so until EVE figures out where I am” delay.
With DX12 turned on, the first few undocks and gate jumps of the day are very slow and very chunky/laggy/pausing. It appears to improve over time. I don’t multibox or multi-monitor - single screen, full screen, at 1920x1080. Graphics aren’t even all set to High, some are medium and shadows are off.
Some people found limiting frame rate or VSync to help:
If I find any other tips I’ll post them here.